Differential temperature control



FIG. 1 is a front and top-left perspective view of a differentialtemperature control showing my new design;

FIG. 2 is a left side elevational view thereof, the right side being amirror image thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a bottom plan view thereof.

The ornamental design for a differential temperature control, as shownand described.